.canvas {
  width: 100%;
  height: 100%;
  position: relative;
  border: 1px dashed transparent;
  &.dragenter {
    .c-tabs {
      overflow: visible;
    }
  }
  &.drop {
    border-color: @primary-color;
  }
  .position-box {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 0;
    &.dragenter {
      z-index: 2;
    }
  }
  .wrap-list {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 1;
  }
}